Mymensingh Girls
Cadet College
Pre-test
Examination-2008
Class-X
Subject-
Chemistry (Subjective)
Time: 2 hrs. Marks:
40
1. Usually the rate of reaction will be
double for increase of temperature –
a) 100C b)
200C c) 300C d)
400C
2. When did scientist kossel give the idea
of ionic bond?
a)
1910 b) 1912
c) 1915 d)
1916
3. Which of the metal can not replace
hydrogen from acid?
a)
Mg b) Zn c) Ag d)
Fe.
4. In thermochemical reaction the standard
temperature is –
a)
O k b)
298 k c) 100 k
d) 273 k
5. Which one of the following ion is at
the top of the reactivity series?
a)
SO42-
b) SO32- c)
OH- d) Cl-
6. What is the cause of passivation of
iron?
a)
Zine sulphate b) Copper sulphate
c)
Rust d) Tri –iron tetraoxide
7.
Which one of the following metal
is used for the preparation of fire producing bomb?
a)
Ca b)
Na c) Pb
d) Mg
8. Which one of the following used to
produce white fumes in the theatre stage?
a)
NH3 b) CO2 c)
NO2 d) SO2
9. Which one of the following attacks
methyl group in acetic acid?
a)
PCl3 b) PCl5 c)
Cl2 d) Na
10. Which one of the following has maximum
intermolecular force?
a)
Kerosene b) Water
c)
Common slat d) Nitrogen.
11. Who first introduced the concept of the
law of Reciprocal proportions?
a)
John Dalton b) Richter
c)
Gay Lussac d) Avogadro
12. What in the volume of 16 gm oxygen gas at
S.T.P. ?
a) 22.4 L b)
11.2 L c) 224 L d) 448 L.
13. The molecular mass of a compound is 180
and empirical formula is CH2O. What is the molecular formula of the
compound?
a)
CH4O b) C6H6O
c)
C6H12O6 d) H2CO3
14. What is the valency of thio sulphate
Radical?
a)
1 b)
2 c) 3
d) 4
15. Which one of the following is not stable
fundamental particle?
a) Proton b)
Neutron c) Electron d)
Positron
16. The shape of a molecule of ammonia is-
a)
Linear b) Angular
c)
Pyramidal d) Tetrahedral.
17. 2, 8, 18 is the electronic configuration
of –
a) Argon b)
Kripton c) Helium d)
Radon
18. Ammonium Cyanate is converted into Urea by
a)
Isomerism b) Neutralisation
c)
Decomposition d) Polymerisation
19. Which is necessary for the chemical
reaction, CH4 + Cl2 = CH3 Cl + HCl?
a)
Light b) Electricity
c)
Heat d) Pressure.
20. The heat of neutralisation of a strong
acid and a strong base is –
a) -57.3 KJ b) 57.3 KJ
c) 100 KJ d)
573 KJ
21. Which one of the following is not
produced by the electrolysis of a solution of sodium chloride?
a)
Iron b) Sodium hydroxide
c)
Hydrogen d) Chlorine
22. Which one can show the property of
catenation?
a)
Na b) H2 c)
Cl2 d) C.
23. Which is the formula of gluconic acid?
a)
C6H12O7 b) C6
H6
c)
C12 H22 O11 d) C6
H12 O6.
24. Which one of the following is used for
the preparation of rat Killer?
a)
S b) Cl2 c)
P d) N2
25. Which one reacts with water catches fire?
a)
Calcium b) Magnesium
c)
Potassium d) Zinc
26. When heated, some solid substances, are
directly converted into vapour. This process is called-
a)
Distillation b) Sublimation
c)
Evaporation d) Condensation
27. Which one of the following is metalloid?
a)
Mercury b) copper
c)
Zinc d) Boron.
28. Which of the following element has valency 3
?
a)
S b) Na
c) N d)
C.
29. What is the percentage of composition of
oxygen in perchloric acid?
a) 0.996% b) 32%
c) 35.3% d)
63.68%
30. Which one of the two isotopes is not
equal?
a)
Atomic Number b) Electron
c)
Mass Number d) Chemical
properties
31. Which one of the following is polar
compound?
a) Alcohol b)
Ether c) Benzene d)
Petrol
32. How many atoms are in a molecule of
sulphur?
a)
2 b) 4
c) 6 d) 8
33. Which oxide belongs to the element of
group VI ?
a)
P2O5
b) Al2O3 c)
SO3 d) Cl2 O7
34. What is absolutely necessary for a
chemical reaction?
a)
Heat b) Light c)
Catalyst.
d)
contanct between the reactants.
35. Which of the following compound is
aromatic?
a) C2H6 b) C2H4 c) CH3Cl d) C6H5
CH3
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